KR20110055231A - Method for managing registration state of voice call continuity subscribers - Google Patents

Abstract

PURPOSE: A registration state managing method of a VCC subscriber is provided to supply SC registration state change information of a VCC subscriber to a VCC AS through the use of a specific MAP operation in an HLR. CONSTITUTION: An MSC(Mobile Switching Center)(350) requests the location registration of a subscriber to an HLR(Home Location Register)(320). The HLR transmits profile information of the corresponding subscriber to the MSC. The MSC transmits a response message of profile information to the HLR. The HLR transmits a response message about a subscriber location registration to the MSC. The HLR transmits information about the change of CS(Circuit Switched) state to a VCC AS(Voice Call Continuity Application Server)(110). The VCC AS updates the CS state information of the corresponding subscriber.

Description

Method for managing registration state of Voice Call Continuity subscribers}

The present invention relates to VCC (Voice Call Continuity), and in particular, the registration status management method of the VCC subscriber that can check the CS registration status information of the VCC subscriber in a system separated from the Home Subscriber Server (HSS) and HLR (Home Location Register) It is about.

IP Multimedia Subsystem (IMS) Service Continuity is a technology that provides data continuity so that users are not disconnected from other networks and devices while they are on the move. As the network has evolved from a Circuit Switched (CS) network to a Packet Switched (PS) network, many discussions have been made about technical standards for continuously providing voice call service provided by the existing network in the PS network. come. Recently, with the introduction of IPTV (Interner Protocol Television), mobile TV, and triple-play services as well as voice services, the market demand for providing continuity of real-time data and multimedia services has arisen. To enable this, 3GPP (3rd In the Generation Partnership Project, standardization is being progressed not only for delivering multimedia sessions between different networks to the same terminal device but also for transferring sessions between different devices in the same network.

Service continuity can be broadly classified into network transfer and device transfer. Among these, network delivery is a technology for delivering a session without disconnection between different networks within the same terminal device. A typical standard technology for network delivery may include a VCC (Voice Call Continuity) technology.

VCC is a technology that provides continuity of voice call service when the terminal moves between the existing CS network and the IMS network. Session delivery control in VCC is performed by the VCC application server (VCC AS), which performs seamless handover between heterogeneous networks such as Wi-Fi (WiFi) or Global System for Mobile communication (GSM), It provides a seamless voice service function to a VCC subscriber using a DBB (DualBand DualMode) terminal even under limited coverage.

The VCC AS located in the IP Multimedia Subsystem (IMS) is disconnected by allowing all the voice call setup related signaling of the VCC subscribers to pass through them, and controlling the call through anchoring. It can provide a voice service that does not exist.

If an attempt is made to reach a VCC subscriber, the VCC AS will allow the call to be forwarded according to the subscriber's IMS / CS registration status. Therefore, when the VCC subscriber changes the IMS / CS registration status, the VCC AS receives a corresponding information.

According to the proposal of the conventional GSM technology, the Home Subscriber Server (HSS) and the Home Location Register (HLR) are integrated so that the VCC AS can receive and manage the information according to the CS registration status change of the VCC subscriber through the HSS interworking. It is introduced. However, depending on the system, HSS and HLR may be implemented separately without being integrated. In this case, there is a problem that the VCC AS cannot receive CS registration status information of the VCC subscriber.

Therefore, the technical problem to be achieved by the present invention is to provide a registration status management method of the VCC subscriber that can manage the CS registration status information of the VCC subscriber in a system separated from the HSS and HLR.

In accordance with an aspect of the present invention, there is provided a method for managing a registration state of a VCC subscriber. In a system for providing a VCC service between heterogeneous networks, when an attachment is requested from a VCC UE, the MSC is a subscriber. Requesting the subscriber's location registration to the HLR for location registration; The HLR receiving the request transmits profile information of the subscriber to the MSC; The MSC receiving the profile information transmitting a response message of the received profile information to the HLR; Receiving, by the HLR, the response message, sending a response message for subscriber location registration to the MSC; Transmitting, by the HLR, information according to a change of a CS state of a corresponding subscriber to a VCC AS; And updating and managing the CS state information of the subscriber by the VCC AS having received the information according to the CS state change from the HLR.

In accordance with an aspect of the present invention, there is provided a method for managing a registered state of a VCC subscriber, in a system for providing a VCC service between heterogeneous networks, from the registered CSCC from one of the registered VCC UEs. If is requested, the MSC determines the M-CSI information for the subscriber; Transmitting, by the MSC, CS deregistration information of the corresponding VCC subscriber to the HLR; Receiving, by the HLR, the CS deregistration information, transmitting a response message to the MSC, and transmitting information corresponding to a CS state change of the corresponding subscriber to a VCC AS; And updating and managing the CS state information of the subscriber by the VCC AS having received the information according to the CS state change from the HLR.

In accordance with an aspect of the present invention, there is provided a method for managing a registered state of a VCC subscriber, in a system for providing a VCC service between heterogeneous networks, wherein a VCC UE whose fuzzy state is detected among registered VCC UEs is determined. If there is, transmitting, by the MSC, fuzzy information of the corresponding VCC subscriber to the HLR; Receiving, by the HLR, the fuzzy information, transmitting a response message to the MSC and transmitting information corresponding to a CS state change of a corresponding subscriber to a VCC AS; The VCC AS receiving the information according to the CS state change may include updating and managing CS state information of the corresponding subscriber.

According to an embodiment of the present invention, when the CS registration status is changed according to registration or cancellation of the VCC subscriber's CS network, the HLR provides the VCC subscriber's CS registration status change information to the VCC AS using a specific MAP operation. By doing so, even if the HSS and the HLR are not integrated but separated, there is an effect that the VCC AS can organically manage CS registration status information of the VCC subscriber.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions.

1 is a configuration diagram showing a schematic configuration of a VCC network to which the present invention is applied.

As shown in FIG. 1, the VCC network 1000 may include an IMS Core Network (IP Multimedia Subsystem Core Network) 100, a Wi-Fi Network 200, and a CS (Circuit Switched) Network 300. Can be.

The VCC UE (User Equipment, for example, DBDM terminal) 400 used by the VCC subscriber is a terminal capable of VCC service, performs handover between the Wi-Fi network 200 and the CS network 300 and provides a seamless service. I can receive it.

The IMS core network 100 includes a VCC AS (110), a Call State Control Function (CSCF) 120, a Signaling Gateway (SG) 130, a Media Gateway (MGW) 140, and a MGCF (Media). Gateway Control function (150), and Home Subscriber Server (HSS) 160.

The VCC AS 110 is an application server that provides a VCC service, and establishes a voice call to the VCC UE 400 and between a CS domain (or CS network) and an IMS domain (or IMS network). It consists of entities that perform a series of functions for switching the connection path of 400.

2 is a functional block diagram illustrating an example of a configuration of the VCC AS 110 illustrated in FIG. 1. Referring to this, the VCC AS 110 includes a domain transfer function (111), a domain selection function (112), a DSF (CS adaptation function) 113, and a CAMEL service unit CAMEL Svc 114. The DTF 111 performs domain transfer between the CS domain and the IMS domain. The DSF 112 is responsible for determining (selecting) which domain to use to forward an incoming call to the VCC UE 400. That is, the DSF 112 determines whether to select a CS domain or an IMS domain according to the operator policy and / or user preferences. To this end, the DSF 112 may refer to the IMS registration status and the CS registration status. The CSAF 113 may perform a function necessary for registration with the CS domain. For example, the CSAF 113 may serve as a proxy of the VCC UE 400. The CAMEL service unit 114 allocates an IMRN (IP Multimedia Routing Number) for routing the CS call to the IMS.

The CSCF 120 is an entity in charge of a part related to call and session processing, and includes a gateway function for an incoming call, a call control function, a SPD (Serving Profile Database) function, an address processing function, and the like. The gateway function for incoming calls refers to acting as an entry point and performing routing for incoming calls. In addition, it performs service triggering (triggering) for the input call and is responsible for communication with the HSS (160).

The SG 130 performs a function of converting a transport layer of a signaling protocol to handle the interconnection of signals between the CS domain and the IMS domain.

The MGW 140 is responsible for media data conversion such as voice and video between the CS domain and the IMS domain.

The MGCF 150 is a network entity that allows an IMS user and a CS user to communicate with each other and is responsible for signaling conversion for interworking between the IMS core network 100 and the existing CS network 300 (or PSTN). . Although not shown, the MGCF 150 may include a BGCF (Breakout Gateway Control Function). The BGCF is optimal through number translation for calls received from the IMS core network 100 to the CS network 200. Select the incoming network.

The HSS 160 performs user mobility management between heterogeneous networks and generates security information of a subscriber. The HSS 160 generates data for user authentication, message integrity check, and encryption function support, and supports each service function element authentication procedure. In addition, it checks whether the mobile subscriber can roam and performs network access authority verification function.

The Wi-Fi network 200 may include a Radio Access Network (RAN) 210 and a Connectivity Access Network (IP-CAN) 220.

The RAN 210 is an infrastructure for providing high-speed Internet access and mobile communication service of a mobile device including the VCC UE 400, and performs functions such as access to a PTSN and the Internet, roaming, and quality of service.

The IP-CAN 220 is a network for packet data transmission to the VCC UE 400. In order for the VCC UE 400 to access an IMS domain and receive a service, the IP-CAN 220 must go through the IP-CAN.

The CS network 300 includes a Service Control Point (SCP) 310, a Home Location Register (HLR) 320, a Short Message Service Center (SMSC) 330, an SS7 Signal Transfer Point (STP) 340, and an MSC. (Mobile Switching Center) 350, Base Station Controller (BSC) 360, and Base Transceiver Station (BTS) 370.

The SCP 310 is a computer with a centralized online connection that supports various functions, provides service logic for various services, and performs an intelligent network service scenario.

The HLR 320 is a system for storing and managing information of a subscriber and location information of a terminal in real time, and provides current location information of a subscriber terminal for call reception. In addition, when there is a change in the CS state of the VCC subscriber, the HLR 320 transmits the information according to the CS state change of the subscriber to the VCC AS (110).

The SMSC 330 provides a function of storing and transmitting a short message in which a message to be transmitted does not exceed 80 bytes.

The SS7 STP 340 serves as a path of the SS7 protocol and switches various SS7 messages to the destination point.

The MSC 350 is responsible for mobility management, location registration / management, authentication, handover, roaming, and the like.

The BSC 360 manages and controls a plurality of base stations (BTSs) and interworks with the MSC 350.

The BTS 370 is connected to a mobile device including the VCC UE 400 in a wireless section to control the mobile device and connect a call channel.

As shown in FIG. 1, the HSS 160 is included in the IMS core network 100 and the HLR 320 is included in the CS network 300, respectively. Accordingly, the present invention allows the HLR 320 to provide the VCC subscriber CS registration state change information to the VCC AS 110 using a specific MAP operation (eg, ServiceInforDirective).

3 is a flowchart illustrating a method of managing a registration status of a VCC subscriber according to an embodiment of the present invention, and shows a CS registration status information transmission procedure.

Referring to FIG. 3, when the VCC UE 400 registers with the CS network 300 in step S210, the MSC 350 registers the HLR (HLR) for location registration of the subscriber in step S220. 320) to register the subscriber's location.

In response to the request, the HLR 320 transmits profile information of the subscriber to the MSC 350 in step S230. The subscriber's profile information may include Originating CAMEL Subscription information (O-CSI) and Mobility management CAMEL Subscription information (M-CSI). In this case, the HLR 320 may transmit triggering information of the subscriber in the profile information.

Upon receiving the profile information, the MSC 350 transmits a response message of the received profile information to the HLR 320 in step S240.

Upon receiving the response message, the HLR 320 transmits a response message for subscriber location registration to the MSC 350 in step S250. In addition, in step S260, the HLR 320 transmits the information according to the CS state change of the subscriber to the VCC AS (110). In this case, the HLR 320 may transmit the CS registration status change information of the VCC subscriber to the VCC AS 110 using a specific MAP message (eg, a ServiceInfoDirective message). The ServiceInfoDirective message may include a Mobile Station ISDN Number (MSISDN), Attach status, and CSS status.

The VCC AS 110, which has received the information according to the CS state change from the HLR 320, updates and manages CS state information of the corresponding subscriber in step S270.

4 is a flowchart illustrating a method of managing a registration status of a VCC subscriber according to an embodiment of the present invention, and illustrates a procedure of transmitting CS detached status information by a subscriber.

Referring to FIG. 4, when the VCC UE 400 performs deregistration to the CS network by the VCC subscriber in step S310, the MSC 350 performs M-CSI for the subscriber in step S320. (Mobility management CAMEL Subscription information) information is determined. The M-CSI information is information used for identifying a CAMEL Service Environment (CSE) with respect to terminal management events of subscriber stations including the VCC UE 400.

In step S330, the MSC 350 transmits CS deregistration information of the corresponding VCC subscriber to the HLR 320.

The HLR 320 receiving the CS deregistration information transmits a response message to the MSC 350 in step S340. In addition, in step S350, the HLR 320 transmits the information according to the CS state change of the subscriber to the VCC AS (110). In this case, the HLR 320 may transmit the CS state change information of the VCC subscriber to the VCC AS 110 using a specific MAP message (eg, a ServiceInfoDirective message). The ServiceInfoDirective message may include a Mobile Station ISDN Number (MSISDN), a purge status, and a CSS status.

The VCC AS 110, which receives the information according to the CS state change from the HLR 320, updates and manages CS state information of the corresponding subscriber in step S360.

5 is a flowchart illustrating a method of managing a registration status of a VCC subscriber according to an embodiment of the present invention, and shows a procedure of transmitting CS detached status information by a system (MSC).

In step S410, the MSC 350 detects a VCC UE that is in a purge state according to a preset condition (eg, when there is no use request for a predetermined time through a timer operation or the like). Subsequently, in step S420, the MSC 350 transmits fuzzy information of the corresponding VCC subscriber to the HLR 320.

The HLR 320 receiving the purge information transmits a response message to the MSC 350 in step S430. In addition, in step S440, the HLR 320 transmits the information according to the CS state change of the subscriber to the VCC AS 110. In this case, the HLR 320 may transmit the CS state change information of the VCC subscriber to the VCC AS 110 using a specific MAP message (eg, a ServiceInfoDirective message). The ServiceInfoDirective message may include a Mobile Station ISDN Number (MSISDN), a purge status, and a CSS status.

The VCC AS 110 that receives the information according to the CS state change updates and manages CS state information of the corresponding subscriber in step S450.

As described above, when the CS state change is made when the VCC subscriber registers or unregisters in the CS network, or when the MSC 350 detects the deregistration of the VCC subscriber, the HLR uses the specific MAP operation to perform the CS of the VCC subscriber. By providing the state change information to the VCC AS 110, the VCC AS 110 can efficiently manage CS state information of the VCC subscriber.

Since the VCC AS 110 may manage CS state information of the VCC subscriber efficiently, the DSF 112 of the VCC AS 110 may select a domain with reference to the updated CS state information.

The present invention can also be embodied as computer readable codes on a computer readable recording medium. Computer-readable recording media include all types of recording devices that store data that can be read by a computer system.

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like. The program code for performing the online advertising method according to the present invention may be a carrier wave ( For example, transmission via the Internet).

The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.

1 is a configuration diagram showing a schematic configuration of a VCC network to which the present invention is applied.

FIG. 2 is a functional block diagram illustrating an example of a configuration of the VCC AS illustrated in FIG. 1.

3 is a flowchart illustrating a CS registration status information transmission procedure of a VCC subscriber registration status management method according to an embodiment of the present invention.

4 is a flowchart illustrating a procedure of transmitting CS detached state information by a subscriber of a method of managing a registered state of a VCC subscriber according to an embodiment of the present invention.

5 is a flowchart illustrating a procedure for transmitting CS detached state information by a system (MSC) of a VCC subscriber registration state management method according to an embodiment of the present invention.

Claims (11)

In the system for providing VCC (Voice Call continuity) service between heterogeneous networks, Requesting a location registration of a subscriber to a home location register (HLR) for registration of a location of a corresponding subscriber by a mobile switching center (MSC) when a registration is requested from a VCC user equipment (UE); The HLR receiving the request transmits profile information of the subscriber to the MSC; The MSC receiving the profile information transmitting a response message of the received profile information to the HLR; Receiving, by the HLR, the response message, sending a response message for subscriber location registration to the MSC; Transmitting, by the HLR, information according to a change in a circuit switched (CS) state of a subscriber to a VCC application server (AS); And And receiving and updating the CS status information of the subscriber by the VCC AS having received the CS state change information from the HLR. The method of claim 1, wherein the profile information of the subscriber is How to manage the registration status of the VCC subscriber including the triggering information (triggering) of the subscriber. The method of claim 1, Determining, by the MSC, mobility management CAMEL subscription information (M-CSI) information for a corresponding subscriber, when a deregistration from a CS network is requested from the VCC UE; Transmitting, by the MSC, CS deregistration information of the corresponding VCC subscriber to the HLR; Receiving, by the HLR, the CS deregistration information, sending a response message to the MSC, and transmitting information corresponding to a CS state change of the subscriber to the VCC AS; And And receiving and updating the CS status information of the subscriber by the VCC AS having received the CS state change information from the HLR. The method of claim 3, wherein the determining of the M-CSI information And the MSC identifies the CSE (CAMEL Service Environment) for the terminal management event of the VCC UE (400) by using the M-CSI information. The method of claim 1, If the MSC detects a purge state of the VCC UE, transmitting fuzzy information of the corresponding VCC subscriber to the HLR; The HLR receiving the fuzzy information transmits a response message to the MSC and transmits information to the VCC AS according to a CS state change of the corresponding subscriber; And updating and managing the CS status information of the corresponding subscriber by the VCC AS having received the CS state change information. The method of claim 5, wherein the fuzzy information transmitting step If the MSC has not been used for a predetermined time from the VCC UE according to a predetermined condition, the VCC subscriber management state is performed by determining the state of the VCC UE as a fuzzy state. In the system for providing VCC (Voice Call continuity) service between heterogeneous networks, When the deregistration from the CS network is requested from one of the registered VCC user equipments (UEs), determining, by a mobile switching center (MSC), mobility management CAMEL subscription information (M-CSI) information for the corresponding subscriber; Transmitting, by the MSC, CS deregistration information of a corresponding VCC subscriber to a home location register (HLR); Receiving, by the HLR, the CS deregistration information, transmitting a response message to the MSC, and transmitting information corresponding to a CS state change of the corresponding subscriber to a VCC AS; And And receiving and updating the CS status information of the subscriber by the VCC AS having received the CS state change information from the HLR. 8. The method of claim 7, wherein the determining of the M-CSI information And the MSC identifies the CSE (CAMEL Service Environment) for the terminal management event of the VCC UE (400) by using the M-CSI information. In the system for providing VCC (Voice Call continuity) service between heterogeneous networks, When there is a VCC UE in which a purge state is detected among registered VCC UEs, a mobile switching center (MSC) transmitting fuzzy information of a corresponding VCC subscriber to a home location register (HLR); Receiving, by the HLR, the fuzzy information, transmitting a response message to the MSC and transmitting information corresponding to a CS state change of a corresponding subscriber to a VCC AS; And And updating and managing the CS status information of the subscriber by the VCC AS having received the CS state change information. The method of claim 9, wherein the fuzzy information transmitting step And a VCC UE having no request for use for a predetermined time according to a preset condition of the MSC, by determining a state of the corresponding VCC UE as a fuzzy state. A recording medium on which a computer program for executing the registration status management method of a VCC subscriber according to any one of claims 1 to 10 is recorded.

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